KR20210013921A - Server room air conditioning system - Google Patents

Abstract

The present invention provides an air conditioning system for a server room. The air conditioning system for a server room comprises a low-speed distributing plate arranged on an opening part side of one side of an air supply passage unit to allow supply air supplied into a server room to pass through low-speed air current grids formed on the entire surface thereof to uniformly distribute the discharge air volume of the supply air. The supply air supplied to a server room is provided in a stable and uniform air current to minimize noise and vibration. The life of the system is increased. Little static pressure loss occurs in the server room. Therefore, air current pressure imbalance does not occur and thus a hot spot can be prevented. The life of a fan and a motor is increased and maintenance costs are reduced by a stable and uniform air current supply method. A required sufficient air volume can be optimally supplied to a server since control is carried out in accordance with the heat generation rate of the server.

Description

Server room air conditioning system

The present invention relates to an air conditioning system of a server room, and more particularly, by providing uniformly distributed supply air supplied to the server room, it is possible to minimize noise and vibration inside the server room due to a stabilized air flow, and equipment It is related to the air conditioning system of the server room that not only increases the service life but also reduces the power of the blower because there is almost no static pressure loss in the server room.

In general, data centers lease computing facilities or network facilities to companies and individuals, or provide services such as maintenance and repair by attracting customers' facilities, and these data centers are usually equipped with data servers and databases including communication devices. A plurality of racks are installed in a row, and it includes a work space where workers can work.

On the other hand, since the device including the server rack does not operate smoothly at a high temperature, and heat is generated during operation, the data center needs a cooling device to cool it. Furthermore, in the data center, if there is too much moisture in the case of electronic components or circuits, there is a risk of a short circuit, and if the moisture is too low, there is a high risk of problems such as fire or damage to electronic parts due to static electricity and sparks.

Therefore, the data center is equipped with an air conditioning system for cooling and constant temperature and humidity, and examples of such technologies include Korean Patent Publication Nos. 10-0478755, 10-1103394, and 10-2010-0013312. Technologies for various air conditioners installed in the house have been disclosed.

However, in the prior art, in order to maintain constant temperature and humidity in the data center, outside air is introduced and supplied by cooling or heating the outside air to a specified temperature, or mixing the outside air and ventilation, or cooling the ventilation with a heat exchanger using a refrigerant and circulating. I did.

However, the above-described conventional technology consumes a lot of energy to cool outside air and ventilation, and there is a problem in that the ventilation converted to the supply air is contaminated by fine dust or the like.

In the present invention, noise and vibration can be minimized by providing supply air supplied to the server room in a stable and uniform airflow, and the life of the system is increased, and static pressure loss hardly occurs in the server room, so the pressure imbalance of the air flow. As this does not occur, hot spots can be prevented, and the lifespan and maintenance costs of fans and motors are increased and maintenance costs are reduced by a stable and uniform airflow supply method, and the amount of air required for the server is controlled according to the amount of heat generated by the server. Its purpose is to provide an air conditioning system in a server room that can supply optimally.

The air conditioning system of the server room according to the present invention introduces outside air through one side opened to the outside, and an outside air passage that guides the incoming outside air to the other side, and ventilation through one side connected to the server room interior, and An indirect heat exchanger for indirectly exchanging heat with each other while orthogonally connecting the other side of the ventilation passageway to the other side of the ventilation passageway and the other side of the ventilation passageway, and the indirect heat exchanger The indirect heat exchanger is connected to the indirect heat exchanger through one side connected to the indirect heat exchanger, the exhaust passage part for introducing the converted exhaust from outside air to the exhaust through one side connected to the air, and guiding the incoming exhaust to the other side connected to the outside. A supply passage part for introducing the supply air converted from ventilation to supply while passing through and guiding the supplied supply to the other side connected to the room, an inverter compressor selectively compressing the refrigerant, and the refrigerant leaked from the inverter compressor with the exhaust air. A condensing coil condensed by heat exchange, an expansion valve that selectively expands the refrigerant condensed in the condensing coil, and a cooling coil that cools the supply air through heat exchange with the supply air while evaporating the refrigerant expanded in the expansion valve. Control to selectively control the opening and closing of the external air passage, ventilation passage, exhaust passage, and supply passage according to the temperature and humidity of the external air, ventilation, and air supply, and selectively controlling the operation of the refrigerator. A unit and a low-speed rectifying plate disposed on the other side of the opening of the air supply passage and passing air supplied to the server room through low-speed air flow grids formed on the entire surface thereof, and uniformly distributing the discharged air volume of the supply air. do.

At this time, the low-speed rectifying plate according to the present invention is characterized in that the shape of the low-speed air flow grids through which the supply air passes is a honeycomb.

In addition, a first damper provided in a space adjacent to the outside of the external air passage part according to the present invention to control the inflow of external air through a selective proportional opening/closing part, and a first damper provided on the boundary between the interior of the ventilation passage part and selectively And a second damper for controlling the inflow of ventilation through the proportional opening/closing path, and a third damper provided in a space adjacent to the outside of the exhaust passage part and controlling the outflow of ventilation through the selective proportional opening/closing path.

In addition, it is provided in the indirect heat exchanger according to the present invention, and includes a water supply nozzle selectively injecting water to the indirect heat exchanger so that the supply air is cooled by the latent heat of evaporation of the water supply.

In addition, the air conditioning system of the server room according to the present invention is provided in an opening communicating with the air supply passage portion adjacent to the outer air passage portion, and is selectively opened according to the temperature of the outside air, and the outside air introduced into the outer air passage portion is the indirect heat exchange. It includes a bypass damper for guiding the air to flow out directly to the air supply passage without passing through the air.

In addition, the condensation coil of the refrigerator according to the present invention may be disposed in the exhaust passage, and the cooling coil of the refrigerator may be disposed in the supply passage.

In addition, the air conditioning system of the server room according to the present invention includes a filter provided in the supply passage to filter dust from the supply air, and a humidification nozzle provided in the supply passage and selectively spraying moisture into the supply air to humidify it. And an air supply fan provided in the air supply passage to blow air supply passing through the indirect heat exchanger to the low speed rectifying part, and an exhaust air provided at the exhaust passage and blowing exhaust air through the indirect heat exchanger to the other side of the exhaust passage part. It may include a fan.

The air conditioning system of a server room according to an embodiment of the present invention has the following effects.

First, the air conditioning system is simplified because it does not require an exhaust duct and an exhaust fan for smooth exhaust, and there are no facilities other than the air conditioning system for airflow circulation, and maintenance is possible in a space separate from the server room. It is easy to manage and has the effect of reducing cost.

Second, it is possible to minimize noise and vibration by providing the supply air supplied to the server room in a stable and uniform air flow, and to increase the life of the system, and since there is little static pressure loss inside the server room, the pressure imbalance of the air flow is reduced. It does not occur and has the effect of preventing hot spots.

Third, the stable and uniform airflow supply method increases the lifespan of fans and motors and reduces maintenance costs, and control is performed according to the amount of heat generated by the server, so that a sufficient amount of air required for the server can be optimally supplied.

1 is an exemplary view showing an air conditioning system in a server room according to an embodiment of the present invention.
2 is an exemplary view showing a state in which the air conditioning system of the server room is operated according to an embodiment of the present invention.
3 is an exemplary view showing a state in which the air conditioning system of the server room according to an embodiment of the present invention is operated by a bypass.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as being limited to their usual or dictionary meanings, and the inventors appropriately explain the concept of terms in order to explain their own invention in the best way. Based on the principle that it can be defined, it should be interpreted as a meaning and concept consistent with the technical idea of the present invention.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention, and do not represent all the technical ideas of the present invention, and at the time of the present application, they are equivalent to It should be understood that there may be variations.

The present invention provides uniformly distributed supply air supplied to the server room, thereby minimizing the noise and vibration inside the server room due to the stabilized air flow, increasing the equipment life, and almost reducing static pressure loss inside the server room. Since it does not occur, the power of the blower is reduced, and the air conditioning system of the server room is described in more detail with reference to the drawings as follows.

Looking at the air conditioning system of the server room according to an embodiment of the present invention with reference to FIG. 1, the air conditioning system of the server room is largely an external air passage part 100, a ventilation passage part 200, and an indirect heat exchanger 300. ), an exhaust passage part 400, and an air supply passage part 500. First, the refrigerator according to an embodiment of the present invention includes a compressor 610 for selectively compressing a refrigerant with a compression type refrigeration cycle air conditioner, and the A condensation coil 620 that condenses the refrigerant leaked from the compressor 610 by heat exchange with exhaust air, an expansion valve that selectively expands the refrigerant condensed in the condensation coil 620, and the refrigerant expanded from the expansion valve. A cooling coil 630 that cools the supply air by heat exchange with the supply air while evaporating is included, and selectively assists the insufficient amount of cooling heat of the supply air.

The outside air passage part 100 according to an embodiment of the present invention provides a passage through which the outside air (OA) flows into the other side through the opened side.

At this time, the openings of the outside air passage part 100 according to an embodiment of the present invention are formed on the left and right sides of the device, and when the outside air (OA) is introduced from the left and right sides of the device, one side of the inlet port is guided to the other side, which is the outlet port. And, the outside air (OA) guided by the outside air passage part 100 is guided to the indirect heat exchanger 300.

In addition, an outdoor air damper for opening and closing a passage through which the external air OA flows may be provided in the opening of the external air passage part 100 as necessary.

In addition, the outside air passage part 100 includes an outside temperature and humidity sensor (not shown) that measures the temperature and humidity of the outside air (OA), and measures the temperature and humidity of the outside air (OA) measured by the outside temperature and humidity sensor. The value is sent to a control unit (not shown) that controls each damper, air supply and exhaust fan, refrigerator, and the like.

In the ventilation passage 200 according to an embodiment of the present invention, one opened side is connected to the interior of the server room, and through one side, the ventilation (Return Air) flowing out of the server room is introduced into the interior. Provides a passage to flow to the other side.

At this time, the ventilation passage part 200 is provided to surround the external air passage part 100 from the top, guides the ventilation (RA) to flow from one side as the inlet to the other side as the outlet, and the ventilation passage part 200 The other side is connected to the indirect heat exchanger 300, and a ventilation damper 210 is provided in the front bordering the interior of the server room to selectively open and close the ventilation passage.

According to the above configuration, the other side of the external air passage part 100 is connected to the upper portion of the indirect heat exchanger 300, and the other side of the ventilation passage part 200 is connected to one side of the indirect heat exchanger 300. , The indirect heat exchanger 300 flows the outside air (OA) and the ventilation (RA) in a cross flow that is orthogonal, so that the outside air (OA) and the ventilation (RA) indirectly heat exchange with each other.

Herein, looking at the indirect heat exchanger 300 according to an embodiment of the present invention in more detail, the indirect heat exchanger 300 is a diaphragm for indirectly performing heat exchange as the outside air (OA) and ventilation (RA) are close to each other. (Not shown), a first member (not shown) providing a flow path for the outside air (OA), and a second member (not shown) providing a flow path for ventilation (RA), the diaphragm At least two or more of the plurality of plates are formed, and the plurality of plates form the structure of the indirect heat exchanger 300 stacked at a predetermined interval from each other.

At this time, first and second members are alternately disposed between the partition plates stacked on each other to provide flow paths for the outside air (OA) and ventilation (RA), respectively.

Here, the first member and the second member are corrugated, and their upper and lower limits are joined to the diaphragm to form an outdoor air passage through which outside air passes and a ventilation passage through which ventilation passes.

The first member and the second member are disposed to cross each other in a longitudinal direction to form a'+' shape, so that the outside air (OA) and the ventilation (RA) show a cross flow, and the outside air (OA) And as the ventilation (RA) passes through the outside air channel and the ventilation channel, heat of the outside air (OA) and the ventilation (RA) is conducted to the diaphragm, and heat exchange between the outside air (OA) and the ventilation (RA) is made through the diaphragm.

Here, the indirect heat exchanger 300 according to an embodiment of the present invention is provided with a hydrophilic coating surface, and the hydrophilic coating surface is a latent heat of evaporation of the water supply to increase the heat exchange efficiency of outdoor air (OA) and ventilation (RA). In that, the diaphragm, the first member and the second member constituting the indirect heat exchanger 300 are made of an aluminum thin plate, and after the corrosion-preventing epoxy coating on the surface of the aluminum thin plate, hydrophilic epoxy is coated, so that vaporization of the water supply is performed. It is desirable to be facilitated.

In addition, in order to supply water to the indirect heat exchanger 300, a water supply nozzle 310 is provided above the indirect heat exchanger 300, and the water supply nozzle 310 is connected to a water supply or a water supply tank to supply water supply. The water supply line is connected to the water supply line, and the water supply flowing along the water supply line is sprayed as a mist to the indirect heat exchanger 300 through the water supply nozzle 310, and passes through the outside air passage of the indirect heat exchanger 300. The outside air (OA) is cooled to a temperature lower than the point at which sensible heat exchange with the ventilation (RA) is performed by the latent heat of evaporation of the water supply, and in the present invention, this is referred to as indirect evaporation operation of the indirect heat exchanger (300).

Here, the injection flow rate of the water supply nozzle 310 is controlled according to the temperature of the outside air (OA), and the nozzle supply pressure is adjusted so that the mist can be sprayed even at a relatively low pressure of 2 bar.

In addition, one side of the exhaust passage part 400 is connected to the lower portion of the indirect heat exchanger 300, and the exhaust passage part 400 passes through the indirect heat exchanger 300 and exchanges air with ventilation (RA). Provides a passage through which the exhaust (EA) converted from (OA) to exhaust (EA) flows to the other side and discharges it to the outside.

At this time, an exhaust damper 410 is provided in an opening connected to the outside, which is the other side of the exhaust passage part 400, to control opening and closing of the exhaust passage EA, and an exhaust fan 420 in front of the exhaust damper 410 Is provided, the exhaust (EA) converted from the outside air (OA) to the exhaust (EA) while passing through the indirect heat exchanger (300) is forcibly blown to the outside, and the amount of air blown according to the temperature of the supply air (SA) is selectively Is regulated.

In addition, one side of the supply air supply passage part 500 is connected to the other side of the indirect heat exchanger 300, and the other side of the supply air supply passage part 500 is connected to the room, so that outside air (OA) from the indirect heat exchanger 300 A passage for resupplying the air supply (SA) converted from ventilation (RA) to supply air (SA) by heat exchange with air is provided.

At this time, the other side of the air supply passage part 500 is preferably connected to the interior of the server room, and the inside of the air supply passage part 500 is a supply air temperature and humidity sensor that measures the temperature and humidity of the air supply SA supplied to the room. (Not shown) is provided, and the temperature and humidity measurement values of the supply air SA measured by the supply air temperature and humidity sensor are transmitted to a control unit (not shown).

And the air supply passage part 500 according to an embodiment of the present invention includes a filter 510, a cooling coil 630, a humidifier 520, an air supply fan 530, a low speed rectifier plate 540, and an air supply damper ( 550) is provided, and the filter 510 is disposed close to the other side of the indirect heat exchanger 300, passes the supply air supplied to the server room, and filters dust from the supply air.

At this time, a cooling coil 630 of the refrigerator is disposed behind the filter 510 to selectively cool the supply air passing through the filter by heat exchange with a refrigerant, and a humidifier 520 is behind the cooling coil 630 Is provided, the humidifier 520 selectively humidifies the air supply passing through the air supply passage part 500.

In addition, an air supply fan 530 is provided inside the air supply passage part 500 to forcibly blow the air supply (SA) introduced from one side to the other side, and the air supply amount of the air supply (SA) is discharged from the interior of the server room. The air volume can be selectively adjusted according to the temperature of the ventilation (RA).

And the low-speed rectifying plate 540 is disposed on the side of the other side opening of the air supply passage part 500, and passes the supply air supplied to the inside of the server room through the low-speed air flow grids formed on the entire surface, and the discharge air volume of the supply air Is uniformly distributed and discharged.

At this time, the shape of the low-speed air flow grids of the low-speed rectifying plate 540 through which the supply air passes is formed as a honeycomb, so that the air supply induction effect can be minimized.

The air supply damper 550 provided in the other opening of the air supply passage part 500 selectively opens and closes the air supply passage part 500 according to the operation of the system.

In addition, the air supply passage part 500 communicates with each other through an adjacent external air passage part 100 and an opening, and selectively opens and closes at an opening in which the air supply passage part 500 and the external air passage part 100 communicate with each other. A bypass damper 110 is provided, and by the opening of the bypass damper 110, all or only a part of the outside air introduced into the outside air passage part 100 is directly bypassed to the supply air passage part 500, The bypassed outdoor air is converted into a supply air and supplied to the server room interior.

The air conditioning system of the server room according to the present invention includes a control unit (not shown) that controls the system based on values provided by the outside temperature and humidity sensor, the ventilation temperature and humidity sensor, and the supply air temperature and humidity sensor. Based on the measured values applied by the outside temperature and humidity sensor and the supply air temperature and humidity sensor, the control unit performs sensible heat exchange control and humidifier 530 to exchange heat exchange between the outside air (OA) and ventilation (RA) with the indirect heat exchanger (300). Humidification control to humidify the supply air through the humidification control, indirect evaporation control that feeds the supply air to the indirect heat exchanger 300 with the water supply nozzle 310 so that the supply air is cooled with the latent heat of evaporation, and control a refrigerator that assists cooling heat in the supply air by circulating the refrigerant in the refrigerator. do.

When the above-described control unit drives the air conditioning system, the outside air damper, the ventilation damper 210, the exhaust damper 410 and the air supply damper 550 are controlled to open, so that the external air passage, the ventilation passage, the exhaust passage, and the supply passage Each of them is opened, and supply air is provided to the server room by controlling sensible heat exchange of outside air (OA) and ventilation (RA) passing through the indirect heat exchanger 300 for the first time.

At this time, when the supply air supplied to the server room is satisfied and provided at the set supply air temperature, only the exhaust fan 420 disposed in the exhaust passage part 400 is variably operated to adjust the supply air temperature to the set supply air temperature. And, even if the exhaust fan 420 of the exhaust passage part 400 is operated at 100%, when the temperature of supply air is supplied above the set supply air temperature, the water supply nozzle 310 provided in the indirect heat exchanger 300 Through this driving control, mist is injected into the indirect heat exchanger 300 to perform indirect evaporation control.

And when the temperature of the supply air is cooled by indirect evaporation by the drive of the water supply nozzle 310 and the supply air is supplied at a temperature equal to the set supply air temperature, the operation of the water supply nozzle 310 is stopped and controlled, and the exhaust fan ( The temperature of the supply air is controlled so that the temperature of the supply air is set according to the set supply air temperature by variable driving of the 420, and even if the indirect evaporation of supplying water to the indirect heat exchanger 300 is controlled while the exhaust fan 420 is operated 100% When the temperature is provided higher than the set air supply temperature, a refrigeration cycle in which the refrigerant circulates is operated by driving and controlling the compressor 610 of the refrigerator, and the supply air is cooled through the cooling coil 630 and provided to the room.

At this time, when the air supply temperature drops to a temperature corresponding to the set air supply temperature while the refrigerator is operating, the compressor 610 is variably controlled, and when the humidity of supply air supplied to the server room is lower than the set humidity, the humidifier 520 is driven and controlled. And, if the humidity of the supply air is higher than the set humidity, dehumidification is performed selectively.

In addition, referring to FIG. 3, when the temperature and humidity of the outside air flowing into the outside air passage part 100 are in accordance with the set supply air temperature and humidity to be supplied indoors, the external air passage part 100 and the air supply passage part 500 By controlling the opening of the bypass damper 110 provided in the opening communicating with the external air flowing into the external air passage part 100, the external air flowing through the opening and flowing through the opening is immediately converted into a supply air, It controls the bypass operation supplied to the room.

At this time, depending on the flow amount, temperature, and humidity of the supply air, all or only part of the outside air that has flowed into the outside air passage part 100 may be selectively discharged through the opening and supplied to the room.

The present invention has been described with reference to the embodiments shown in the drawings, but these are only exemplary, and those of ordinary skill in the art will appreciate that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

100: external air passage part 110: bypass damper
200: ventilation passage part 210: ventilation damper
300: indirect heat exchanger 310: water supply nozzle
400: exhaust passage part 410: exhaust damper
420: exhaust fan 500: air supply passage part
510: filter 520: humidifier
530: supply fan 540: low speed rectifier plate
550: air supply damper 610: compressor
620: condensing coil 630: cooling coil

Claims (8)

An external air passage portion for introducing outside air through one side opened to the outside and guiding the introduced outside air to the other side;
A ventilation passage for introducing ventilation through one side connected to the server room interior and guiding the introduced ventilation to the other side;
An indirect heat exchanger connecting the other side of the outside air passage part and the other side of the ventilation passage part orthogonally to allow indirect heat exchange with each other while passing the outside air and ventilation in an orthogonal phase;
An exhaust passage for introducing exhaust converted from outside air to exhaust while passing through the indirect heat exchanger through one side connected to the indirect heat exchanger, and guiding the incoming exhaust to the other side connected to the outside;
An air supply passage part for introducing the supply air converted from ventilation to supply air while passing through the indirect heat exchanger through one side connected to the indirect heat exchanger, and guiding the supplied air supply to the other side connected to the room;
An inverter compressor that selectively compresses the refrigerant, a condensation coil that condenses the refrigerant leaked from the inverter compressor through heat exchange with exhaust air, an expansion valve that selectively expands the refrigerant condensed from the condensation coil, and expands in the expansion valve. A refrigerator that includes a cooling coil that cools the supply air by heat exchange with the supply air while evaporating the refrigerant, selectively assisting the amount of cooling heat in the supply air;
A control unit for selectively controlling opening and closing of the outside air passage, ventilation passage, exhaust passage, and supply passage and driving of the refrigerator according to the temperature and humidity of the outside air, ventilation, and supply air; And
A server room including a low speed rectifying plate disposed on the other side of the opening of the air supply passage and passing the air supply supplied to the inside of the server room through low-speed air flow grids formed on the entire surface, and uniformly distributing the discharged air volume of the supply air Air conditioning system.
The method according to claim 1,
The low speed rectifier plate is
Air conditioning system of a server room, characterized in that the shape of the low-speed air flow grids through which the supply air passes are honeycomb.
The method according to claim 1,
A first damper provided in a space adjacent to the outside of the external air passage part and controlling the inflow of external air through a selective proportional opening and closing;
A second damper provided on a boundary with the interior of the ventilation passages to control an inflow of ventilation through a selective proportional opening and closing;
And a third damper provided in a space adjacent to the outside of the exhaust passage part and controlling the outflow of ventilation through selective proportional opening/closing.
The method according to claim 1,
An air conditioning system of a server room including a water supply nozzle provided in the indirect heat exchanger and selectively injecting water to the indirect heat exchanger so that supply air is cooled by the latent heat of evaporation of the water supply.
The method according to claim 1,
It is provided in the opening communicating with the air supply passage part adjacent to the external air passage part, and is selectively opened according to the temperature of the outside air, so that the outdoor air introduced into the external air passage part does not pass through the indirect heat exchanger and flows directly into the supply air supply passage part. Air conditioning system of the server room including a bypass damper.
The method according to claim 1,
The condensation coil of the refrigerator is disposed in the exhaust passage,
The air conditioning system of the server room, characterized in that the cooling coil of the refrigerator is disposed in the supply air passage.
The method according to claim 1,
A filter provided in the air supply passage to filter dust from the air supply;
An air conditioning system of a server room including a humidifying nozzle provided in the air supply passage and selectively spraying moisture into the air supply to humidify it.
The method according to claim 1,
An air supply fan provided in the air supply passage and for blowing air supplied through the indirect heat exchanger to the low-speed rectifier;
And an exhaust fan provided in the exhaust passage and for blowing exhaust air passing through the indirect heat exchanger to the other side of the exhaust passage.

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